Duplicate glossary term is created

We are able to create a duplicate glossary term

Steps to Reproduce:

• Login to zanata
• Go to glossary page
• Create term "test" part of speech "test" and desc "test"
• Observe the dialogue
• Again click on new and create the same term enter same values
• Observe the dialogue
• Again click new and enter only term "test" without any description and part of speech
• Search for created term
• Observe Result

Actual Result:

• glossary term validation is not there

Expected Result:

• Glossary term validation should be there.